MTH1: STATISTICS

STATISTICS

Definition;

Statistics involves the collection, organization, manipulation, representation and analysis of data information.

Examples of data collection include;

• Census through interviews
• Counting etc.

Organizing Data

We normally organize data in a table i.e. the frequency table.

Frequency is the number of times on item appears, Therefore the frequency table shows the number of items in the respective sets of consecutive objects.

Examples:

Below are the number of children in each student’s home?

Frequency Table

.   Below are the colours of shoes students in 2m want most

Organize the data in frequency table.

Representing data

Data is represented on any of the following;

• Pictography
• Pie chart
• Bar chart graph
• Line graph

The Pictograph

Information is represented using pictures. A scale is used, such that the number of pictures represents the frequency.

Examples:

1. The following information gives colours liked most by the pupil’s in S.2 M GHS.

Represent the information on a pictograph

Pictograph showing colours liked most by pupils in S2MGHS

Pie charts

Information is represented using angles. The size of the angle represents the frequency.

Examples

Use a pie chart to represent the following information

2. The following fruits have been picked from a garden for a month and information for every fruit picked.

A pictograph to show fruits that have been picked for month.

Scale 0 : 2 fruits

A pie chart to show fruits that are picked from a garden.’

The Bar Graph / Chart

Information is presented on a graph, with the length of the bars giving the frequency, The bars are drawn with the same width.

Example:

If the frequency table below gives the age of 30 students chosen at random from 9H6 . Draw a bar chart to present this information.